CA2230526C - Systeme et methode de modulation-demodulation par deplacement a etalement du spectre - Google Patents

Systeme et methode de modulation-demodulation par deplacement a etalement du spectre Download PDF

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Publication number
CA2230526C
CA2230526C CA002230526A CA2230526A CA2230526C CA 2230526 C CA2230526 C CA 2230526C CA 002230526 A CA002230526 A CA 002230526A CA 2230526 A CA2230526 A CA 2230526A CA 2230526 C CA2230526 C CA 2230526C
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Canada
Prior art keywords
sequence
symbol
pilot
recited
signal
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA002230526A
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English (en)
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CA2230526A1 (fr
Inventor
Bruce Edward Shockey
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Cincinnati Electronics Corp
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Cincinnati Electronics Corp
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Publication date
Application filed by Cincinnati Electronics Corp filed Critical Cincinnati Electronics Corp
Publication of CA2230526A1 publication Critical patent/CA2230526A1/fr
Application granted granted Critical
Publication of CA2230526C publication Critical patent/CA2230526C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

L'invention est constituée par un système et une méthode de modulation-démodulation comportant une structure d'émission ayant un premier et un second générateur PN qui produisent deux suites PN synchronisées distinctes. Une ligne à retardement dotée de prises produit une pluralité de symboles à partir de la seconde suite PN, chacun de ces symboles correspondant à un décalage de cette seconde suite PN par rapport au temps de la première suite PN. Une pluralité de prises de sortie est associée à cette ligne à retardement, chacune de ces prises correspondant à l'un des symboles. Un dispositif de sélection de symboles associé aux prises de sortie effectue sa sélection de symboles en se basant sur un ou plusieurs bits du signal du message. Les symboles sélectionnés et la première suite PN sont transmis à des canaux distincts d'un modulateur qui module une porteuse. Au point de destination, un premier et un second générateur local de suites PN produisent une première et une seconde suite PN qui correspondent à la première et à la seconde suite PN de la structure de transmission. Une ligne à retardement dotée de prises connectée au second générateur local de suites PN produit une pluralité de symboles qui correspondent aux symboles de la structure de transmission. Un signal de bande de base analogique est extrait de la porteuse modulée et est échantillonné, et chaque échantillon est multiplié par les symboles obtenus de la ligne à retardement. Les produits résultants sont filtrés, sommés et comparés à un seuil prédéterminé, et la somme qui dépasse ce seuil est convertie en une configuration binaire. Les configurations binaires consécutives sont combinées pour produire une chaîne de données série qui correspond au signal du message.
CA002230526A 1997-06-20 1998-02-26 Systeme et methode de modulation-demodulation par deplacement a etalement du spectre Expired - Fee Related CA2230526C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/879,356 1997-06-20
US08/879,356 US6094450A (en) 1997-06-20 1997-06-20 Spread spectrum chip shift keying modulation/demodulation system and method

Publications (2)

Publication Number Publication Date
CA2230526A1 CA2230526A1 (fr) 1998-12-20
CA2230526C true CA2230526C (fr) 2001-12-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA002230526A Expired - Fee Related CA2230526C (fr) 1997-06-20 1998-02-26 Systeme et methode de modulation-demodulation par deplacement a etalement du spectre

Country Status (4)

Country Link
US (1) US6094450A (fr)
CA (1) CA2230526C (fr)
FR (1) FR2765048B1 (fr)
GB (1) GB2327832B (fr)

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EP1282258A1 (fr) * 2001-08-02 2003-02-05 Mitsubishi Electric Information Technology Centre Europe B.V. Procédé et dispositif de synchronisation de récepteurs
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US7283011B2 (en) * 2003-10-10 2007-10-16 Atmel Corporation Method for performing dual phase pulse modulation
US7062228B2 (en) * 2004-05-10 2006-06-13 Harris Corporation Cellular communications system using baseband carrier injection and related methods
US7079577B2 (en) * 2004-09-08 2006-07-18 Atmel Corporation Wide window decoder circuit for dual phase pulse modulation
US7583772B2 (en) * 2005-02-22 2009-09-01 Broadcom Corporation System for shifting data bits multiple times per clock cycle
US7293250B2 (en) * 2005-11-14 2007-11-06 Infineon Technologies, Ag Method of modeling physical layout of an electronic component in channel simulation
US8149956B1 (en) * 2007-04-23 2012-04-03 The United States Of America As Represented By The Secretary Of The Army Method of automated demodulation and classification of phase-shift-keying signals using hysteretic differential zero-crossing time samples
US8391401B2 (en) 2008-09-23 2013-03-05 Qualcomm Incorporated Highly detectable pilot structure
US9680520B2 (en) 2013-03-22 2017-06-13 University Of Washington Through Its Center For Commercialization Ambient backscatter tranceivers, apparatuses, systems, and methods for communicating using backscatter of ambient RF signals
WO2015123341A1 (fr) 2014-02-11 2015-08-20 University Of Washington Procédés, systèmes et dispositifs de communication dans un réseau sans fil pouvant être mis en œuvre à l'aide d'énergie récupérée
WO2015123306A1 (fr) 2014-02-11 2015-08-20 University Of Washington Appareils, systèmes et procédés de communication utilisant mimo et un codage à étalement de spectre dans la rétrodiffusion de signaux ambiants
US10079616B2 (en) 2014-12-19 2018-09-18 University Of Washington Devices and methods for backscatter communication using one or more wireless communication protocols including bluetooth low energy examples
EP3256876B1 (fr) * 2015-02-09 2021-05-05 Concentric Real Time, LLC Récepteur radio pour déterminer l'emplacement d'une source de signal
US10873363B2 (en) 2015-08-12 2020-12-22 University Of Washington Backscatter devices and network systems incorporating backscatter devices
EP3408681B1 (fr) 2016-01-26 2024-01-24 University of Washington Dispositifs de rétrodiffusion comprenant des exemples de fonctionnement à bande latérale unique
CN109073573A (zh) 2016-04-04 2018-12-21 华盛顿大学 提供包含ofdm包的经反向散射信号的反向散射装置及系统
EP3529902B1 (fr) 2016-10-18 2021-06-09 University of Washington Systèmes, dispositifs et techniques de rétrodiffusion utilisant une modulation css et/ou une suppression d'harmoniques d'ordre supérieur
US10461783B2 (en) 2017-03-16 2019-10-29 University Of Washington Radio frequency communication devices having backscatter and non-backscatter communication modes and hardware re-use
CN110663020A (zh) 2017-04-06 2020-01-07 华盛顿大学 使用反向散射装置的图像和/或视频发射

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Also Published As

Publication number Publication date
GB9808302D0 (en) 1998-06-17
FR2765048A1 (fr) 1998-12-24
GB2327832B (en) 2002-06-12
GB2327832A (en) 1999-02-03
FR2765048B1 (fr) 2004-10-22
CA2230526A1 (fr) 1998-12-20
US6094450A (en) 2000-07-25

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